Allen township
- County:
- Darke County
- County Seat:
- No
- Area (mi²):
- 28.765
- State:
- Ohio
Allen township is located in Darke County, Ohio. Allen township has a 2026 population of 1,001. Allen township is currently growing at a rate of 0.1% annually but its population has decreased by -0.4% since the most recent census, which recorded a population of 1,005 in 2020.
The median household income in Allen township is $80,536 with a poverty rate of 12.54%. The median age in Allen township is 44.4 years: 43.4 years for males, and 44.9 years for females. For every 100 females there are 113.0 males.